Similarities and differences between abacus and calculator

        There are a lot of similarities and differences between an abacus and a hand-held calculator. 
        The similariities between abacus and hand-held calculator are they are both calculating devices, and they both can do multiplication, division, subtraction, and addition properties.
        The differences between abacus and hand-held calculator are 1)Abacus was made in 500 BC., it is really old, but hand-held calculator is made in 1967, it is modern technology device. 2)Abacuse isn't electric it is made by wood, rod, and beads, but hand-held calculator is electric, and some of them use solar power. 3)We don't really use abacus in classroom today, but we use hand-held calculator in class a lot. 4)Abacus doesn't have number on it, it only has beads. But hand-held calculator has number on it.